Fix tests to run with the new analysis driver.

pkg/analyzer/test/generated/static_warning_code_test.dart

Index: pkg/analyzer/test/generated/static_warning_code_test.dart
diff --git a/pkg/analyzer/test/generated/static_warning_code_test.dart b/pkg/analyzer/test/generated/static_warning_code_test.dart
index 794ebf50b7e8669fe602e77251291ee406af9c27..1d1b11c5091bdf2b5b185bdf6ec14a3c7705f1b1 100644
--- a/pkg/analyzer/test/generated/static_warning_code_test.dart
+++ b/pkg/analyzer/test/generated/static_warning_code_test.dart
@@ -374,7 +374,8 @@ g(h(_A a)) {}''');
     // The name _A is private to the library it's defined in, so this is a type
     // mismatch. Furthermore, the error message should mention both _A and the
     // filenames so the user can figure out what's going on.
-    List<AnalysisError> errors = analysisContext2.computeErrors(source);
+    TestAnalysisResult analysisResult = await computeAnalysisResult(source);
+    List<AnalysisError> errors = analysisResult.errors;
     expect(errors, hasLength(1));
     AnalysisError error = errors[0];
     expect(StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE, error.errorCode);